CBSE Class 12 Chemistry Question Paper 2022 Set B Solved

Read and download CBSE Class 12 Chemistry Question Paper 2022 Set B Solved designed as per the latest question paper pattern and Class 12 examination guidelines issued by CBSE, NCERT and KVS. The past year Question Papers for Class 12 Chemistry have been provided with solutions which will help students to assess their performance and find out topics in Chemistry Class 12 which they need to improve to get better marks in Class 12 exams. After solving these last year papers also refer to solved Sample Papers for Class 12 Chemistry available on our website to build strong understanding of the subject

Chemistry Question Paper Class 12

Students can refer to the below Class 12 Chemistry Question Paper designed to help students understand the pattern of questions that will be asked in Class 12 exams. Please download CBSE Class 12 Chemistry Question Paper 2022 Set B Solved

Chemistry Class 12 Question Paper

SECTION A
 
1. Which among the following undergoes SN1 faster and why? 
CBSE Class 12 Chemistry Question Paper 2022 Set B Solved 1
 
2. Explain how vacancies are introduced in ionic solid when a cation of higher valence is added as an impurity in it.
 
3. Arrange the following polymers in increasing order of their intermolecular forces: Nylon-6,6, Buna-S, Bakelite
 
4. Write the IUPAC name of [Fe(en)2Cl2]Cl
OR
What are ambidentate ligands?
 
5. What do you understand by the term peptization?
OR
Why is adsorption exothermic in nature?
 
SECTION B
 
6. Name the reagent(s) used in the following conversions
a) Phenol to 2,4,6-trinitropehnol
b) Anisole to 4-Methoxytoluene
 
7. Write the structure of major product of the following reactions:

CBSE Class 12 Chemistry Question Paper 2022 Set B Solved 2

8. Write the structures of the monomers of the following polymers:
(a)Neoprene (b) Bakelite
 
9. a) Define molal elevation constant (Kb)
b) Why are the molecular masses of polymers determined by osmotic pressure method?
 
10. Draw the structures of following: XeO3, H2S2O8 2
 
11. Complete the following equations
a) Fe2+ + Cr2O72- + H+
b) MnO— + S2O3 2-+H2O→
OR
Explain the preparation of potassium permanganate from pyrolusite ore.
 
12. Show that the half-life of a first order reaction is independent of the initial concentration of the reactants.
 
SECTION C
 
13. An element crystallizes in fcc with edge length 200 pm. Calculate its density if 200grams of this element contains 24x 1023 atoms. [Na=6.023x1023]
 
14. a) Which of the following is more stable complex and why?
[Co(NH3)6]3+ and [Co(en)3]3+
b) Why is [NiCl4]2- paramagnetic but [Ni(CO)4] is diamagnetic?
c) On the basis of crystal filed theory, write the electronic configuration of d4 ion,in an octahedral field when Δo˃P.
 
15. Write chemical equations when
a) Ethyl chloride is heated with silver fluoride
b) Chlorobenzene is treated with CH3COCl in the presence of anhydrous AlCl3
c) Benzyl alcohol is treated with thionyl chloride
OR
Account for the following
i) Ethyl iodide undergoes faster SN2 than ethyl bromide
ii) p-dichlorobenzene has higher melting point than those of ortho or meta isomers
iii) Haloarenes are less reactive to nucleophiles
 
16. 2g of benzoic acid dissolved in 25g of benzene shows a depression in freezing point equal to 1.62K. What is the percentage association of acid if it forms dimer in solution? [Given Kf for benzene 4.9K kg/mol, molar mass of benzoic acid=122g/mol, molar mass of benzene=78g/mol]
 
17. Explain what is observed when
a) An electric current is passed through a sol
b) A beam of light is passed through a sol
c) An electrolyte is added to ferric hydroxide sol
OR
Write one difference between
i) Lyophobic and lyophilic colloids
ii) Heterogenous and homogenous catalysis
iii) Macromolecular and associated colloids
 
18. a) Why is the reduction of a metal oxide easier if the metal formed is in the liquid state at the temperature of reduction?
b) Describe with equations, the principle of vapour phase refining of zirconium.
 
19. What happens when D-glucose is treated with
a) HI b) NH2OH c) Br2 water
OR
What are fibrous and globular proteins? Give an example each.
 
20. Mention the action of the following on the human body in bringing relief from a disease
a) Cimetidine
b) Chloramphenicol
c) Aspirin
 
21. Give reason for the following
a) Of the d4 species, Cr2+ is strongly reducing whereas Mn3+ is strongly oxidizing
b) Cu+ ion is not stable in aqueous solutions
c) Transition metals generally form colored compounds.


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Previous Year Question Paper Chemistry Class 12

We hope you liked the above provided CBSE Class 12 Chemistry Question Paper 2022 Set B Solved. To get an understanding of the type of questions which were asked in previous year exams, it is important for Class 12 students to refer to CBSE Class 12 Chemistry Question Paper 2022 Set B Solved that we have provided above. Students can download all the Question Papers for Class 12 Chemistry which were issued in the exams so that you can practise them and solve all types of questions which have been asked till now. If you do CBSE Class 12 Chemistry Question Paper 2022 Set B Solved for Class 12 Chemistry you will easily understand the way examination question papers are set by teachers.

Class 12 Chemistry Previous Year Question Papers

The past year question papers CBSE Class 12 Chemistry Question Paper 2022 Set B Solved covers all the topics which have been suggested by CBSE in their Class 12 Chemistry syllabus for the current year. By doing all CBSE Class 12 Chemistry Question Paper 2022 Set B Solved PYP (previous year papers) you will understand the regular questions and MCQ questions for Class 12 Chemistry which are always asked and learn them so that you can get full marks in those questions.

Class 12 Chemistry Model Question Paper Pdf Download

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Chemistry Previous Year Question Papers Class 12 with Solutions

We have provided CBSE Class 12 Chemistry Question Paper 2022 Set B Solved with solutions. You will be able to understand the type of answers which you should write in Class 12 Chemistry exams to score good marks. You should attempt all the last year question paper for Class 12 and Class 12 Chemistry MCQ Test in examination conditions at home and then compare their answers with the solutions provided by our teachers. This way you will be able to identify your weak areas and also understand how the teachers of Class 12 Chemistry set their questions in the exams.

CBSE Class 12 Chemistry Previous Year Question Papers with solutions

We have provided the last 10 years Class 12 Chemistry Question Papers. Students who want to practice question papers from all previous years can easily get them on studiestoday. We are the leading website in India from which you can download all the latest Class 12 Chemistry study material for free as per the CBSE syllabus for Class 12 Chemistry for the current academic year.
 

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